B727 flight crew experiences hydraulic system 'a' failure while on approach to phl.

Attributes
ACN	439519
Time
Date	199906
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : phl.airport
State Reference	PA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phl.tracon
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 10000 flight time type : 5000
ASRS Report	439519
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : hydraulic quantity other flight crewa other flight crewb other other : 4
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

While on approach to phl, lost most of hydraulic fluid to system 'a.' performed procedures, declared an emergency, and made a normal landing.

Original NASA ASRS Text

Title: B727 FLC EXPERIENCES HYD SYS 'A' FAILURE WHILE ON APCH TO PHL.

Narrative: WHILE ON APCH TO PHL, LOST MOST OF HYD FLUID TO SYS 'A.' PERFORMED PROCS, DECLARED AN EMER, AND MADE A NORMAL LNDG.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.